The Valve,restrictor Check, cataloged under National Stock Number 4820-00-461-1738, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Saf Industries Llc Dba Saf Industries Llc Div Garkenyon. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-461-1738 |
| Primary Part Number | 1R0448-37 |
| Item Name | Valve,restrictor Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Saf Industries Llc Dba Saf Industries Llc Div Garkenyon |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Surface Treatment Document and Classification | MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE |
| Connection Style | FLARELESS FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Aperture Diameter | 0.040 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.437 INCHES FIRST END IN |
| Seat Angle | 12.0 DEGREES FIRST END |
| Disk Loading Method | SPRING |
| Surface Treatment | ANODIZE |
| Thread Class | 3A FIRST END A |
| Thread Quantity Per Inch | 20 FIRST END |
| Material | STEEL COMP 303 FLOW CONTROL DEVICE |
| Material | RUBBER SYNTHETIC PACKING |
| Material | ALUMINUM ALLOY 2024 SEAT |
| Material | ALUMINUM ALLOY 2024 BODY LINING |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1R0448-37 PRIMARY | Saf Industries Llc Dba Saf Industries Llc Div Garkenyon (USA) |
| Reference | Meaning |
|---|---|
| 4R113-37 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 215-32320-37 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-461-1738 is a Valve,restrictor Check, manufactured by Saf Industries Llc Dba Saf Industries Llc Div Garkenyon, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-461-1738 has 1 manufacturer part number on file: 1R0448-37 (Saf Industries Llc Dba Saf Industries Llc Div Garkenyon).
Key specifications for 1R0448-37: Flow Control Device: POPPET; Surface Treatment Document and Classification: MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE; Connection Style: FLARELESS FIRST END; Mounting Position: HORIZONTAL OR VERTICAL. 21 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4820-00-461-1738 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.